Sexual differentiation of copulatory behaviour in the male chick requires gonadal steroids.

N. Sayag; N. Snapir; E. Arnon; M. E. el Halawani; V. E. Grimm; B. Robinzon

Sexual differentiation of copulatory behaviour in the male chick requires gonadal steroids.

N. Sayag, N. Snapir, E. Arnon, M. E. el Halawani, V. E. Grimm, B. Robinzon

Animal Science

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Abstract

1. Embryonic injections of 0.3 mg/egg of tamoxifen (TAM), 0.2 mg/egg CI-628 (both antioestrogens), 0.5 mg/egg (ATD (aromatisation inhibitor), or antibodies to oestradiol (E), all suppressed male copulatory activity (MCA) in young male chicks. 2. Embryonic injections with either flutamide (F, androgen antagonist) or high dose of antibodies to testosterone (T) only slightly suppressed MCA. 3. TAM had no effect on embryonic plasma LH levels, 24 and 48 h after injection. 4. It seems that at the embryonic stage oestradiol is required for the normal differentiation of MCA.

Original language	English (US)
Pages (from-to)	607-617
Number of pages	11
Journal	British Poultry Science
Volume	32
Issue number	3
State	Published - Jul 1991

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title = "Sexual differentiation of copulatory behaviour in the male chick requires gonadal steroids.",

abstract = "1. Embryonic injections of 0.3 mg/egg of tamoxifen (TAM), 0.2 mg/egg CI-628 (both antioestrogens), 0.5 mg/egg (ATD (aromatisation inhibitor), or antibodies to oestradiol (E), all suppressed male copulatory activity (MCA) in young male chicks. 2. Embryonic injections with either flutamide (F, androgen antagonist) or high dose of antibodies to testosterone (T) only slightly suppressed MCA. 3. TAM had no effect on embryonic plasma LH levels, 24 and 48 h after injection. 4. It seems that at the embryonic stage oestradiol is required for the normal differentiation of MCA.",

author = "N. Sayag and N. Snapir and E. Arnon and {el Halawani}, {M. E.} and Grimm, {V. E.} and B. Robinzon",

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AU - Sayag, N.

AU - Snapir, N.

AU - Arnon, E.

AU - el Halawani, M. E.

AU - Grimm, V. E.

AU - Robinzon, B.

PY - 1991/7

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AB - 1. Embryonic injections of 0.3 mg/egg of tamoxifen (TAM), 0.2 mg/egg CI-628 (both antioestrogens), 0.5 mg/egg (ATD (aromatisation inhibitor), or antibodies to oestradiol (E), all suppressed male copulatory activity (MCA) in young male chicks. 2. Embryonic injections with either flutamide (F, androgen antagonist) or high dose of antibodies to testosterone (T) only slightly suppressed MCA. 3. TAM had no effect on embryonic plasma LH levels, 24 and 48 h after injection. 4. It seems that at the embryonic stage oestradiol is required for the normal differentiation of MCA.

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Sexual differentiation of copulatory behaviour in the male chick requires gonadal steroids.

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